Mir is obsessed with fighting Lesnar again and beating him, while Carwin was supposed to challenge for Lesnar's belt way back in November, before Lesnar's career-threatening medical drama unfolded.

If the winner of this fight turns up with an injury, the real winner would be Cain Velasquez, who would step in as Lesnar's challenger while Mir or Carwin heals.

Brock Lesnar is standing next to Dana White at cageside as the fight begins.

Round 1: Nobody throws a strike for about 40 seconds. Carwin forces Mir to the cage wall and tries to gets some dirty boxing going. Mir fighting to avoid a takedown now. More short punches and foot stomps by Carwin. Knees to the inside of Mir's thigh by Carwin. Referee Dan Miragliotta breaks them up. Carwin throws a combo and misses. Mir misses the counter. Mir connects on a combo of his own and forces Carwin's back to the cage wall. Carwin reverses position. Short inside punches by Carwin.

Carwin crushes Mir with a series of hard uppercuts and Mir goes to the canvas. He follows up with what must have been 15 or so punches on the ground. Mir rolls out from behind and grabs Carwin's arm, but he really doesn't have anything. Carwin keeps going Donkey Kong on Mir until he flattens out, face-first, and stops defending himself. Miragliotta allows Carwin to get in a few more free shots before stopping the fight.

One of the most dominant fighters in MMA -- and perhaps the single best pound-for-pound fighter in the world -- Georges St. Pierre returns to the Octagon on Saturday, defending his title against Dan "Outlaw" Hardy at UFC 111 in Newark, N.J.

CBSSports.com will have live round-by-round coverage and analysis of the fights, as they happen, on Saturday. Check back at this link for frequent updates on fight night.

Weigh-ins took place Friday afternoon in Jersey. Full UFC 111 card -- and official fighter weights -- below.

MAIN CARD

Georges St-Pierre (170) vs. Dan Hardy (170)

Frank Mir (265) vs. Shane Carwin (265)

Kurt Pellegrino (155) vs. Fabricio Camoes (155)

Jon Fitch (171) vs. Ben Saunders (169)

Jim Miller (155) vs. Mark Bocek (154)

UNDERCARD

Nate Diaz (171) vs. Rory Markham (177)*

Ricardo Almeida (170) vs. Matt Brown (170)

Rousimar Palhares (186) vs. Tomasz Drwal (185)

Jared Hamman (205) vs. Rodney Wallace (206)

Matt Riddle (170) vs. Greg Soto (170)

Markham missed weight by a significant margin, but Diaz agreed to the fight anyway. It's now a catchweight bout.

Moving right along to the semi-main event, as Frank Mir tries to bounce back from his loss to Brock Lesnar by taking on Cheick Kongo.

Kongo stood with his back to Mir at the weigh-ins, refusing to do the traditional photo-op staredown. Kongo thinks Mir doesn't respect him and talks too much trash, which indeed seems to be the case. Mir also weighed in very close to the 265-pound limit, having added lots of muscle since the Lesnar loss.

Round 1: They don't touch gloves. This is personal for Kongo. Kongo rifles Mir in the jaw with a straight right. Mir catches Kongo with a big left that drops him. Mir tries to follow him down with strikes, but Kongo grabs a leg and tries to stand. Mir slaps on a guillotine choke. Kongo fights it for a while, but has to tap out. That was fast. Kongo is actually out cold, but he did manage to tap out right before he passed out.

Correction: On the replay from a different camera angle, we see that Kongo didn't tap. The tapping motion his arm made was caused by referee Herb Dean grabbing his wrist and shaking it to confirm that he was unconscious.

There are times when a UFC fight gets a whole lot more interesting due to a late change of opponents. Over the course of the past three days, that has happened twice.

In the most time-sensitive switch, Chris Wilson was scratched from Saturday's UFC 98 card with barely two days' notice, after the Nevada State Athletic Commission could not get Wilson's doctor on the phone to provide necessary medical information. The NSAC reportedly left numerous messages for the doctor and simply never got a call back. As a result, the commission was left with no choice but to pull Wilson from the show.

Wilson's replacement against Brock Larson will be Mike "Quicksand" Pyle (17-5-1), an Xtreme Couture fighter making his UFC debut after lots of experience elsewhere, including EliteXC, Affliction, Strikeforce, WEC and the IFL. Pyle has won his last four fights (all via submission), and six of his past seven bouts. Pyle's only loss during that stretch was to Jake Shields in Nov. 2007.

Earlier this week, another late switch resulted in an intriguing heavyweight battle that just might put the winner on the radar for a possible title shot vs. Brock Lesnar (or Frank Mir , pending the outcome of that title fight at July's UFC 100).

"The Texas Crazy Horse" Heath Herring pulled out of his UFC 99 bout vs. up-and-comer Cain Velasquez on June 13 in Germany, citing either illness (as reported by MMA FanHouse) or injury (as reported by the UFC) as the cause. Either way, his replacement is a solid test for the former collegiate wrestling standout, as Velasquez will now battle Cheick Kongo .

Kongo (14-4-1, 7-2-0 UFC) has won five of his last six fights, with the only loss in that time frame coming at the hands of Herring in March of 2008. Since then, Kongo has made quick work of Dan Evensen , Mustapha Al-Turk and Antoni Hardonk .

Velasquez (5-0-0, 3-0-0 UFC) won his first four fights via knockout in the first round, and his most recent bout -- vs. Denis Stojnic at February's UFC Fight Night 17 -- via TKO at 2:34 of Round 2.

A standout wrestler at Arizona State, Velsaquez has the athleticism, punching power and solid wrestling base that has many observers calling him the future of the UFC heavyweight division, and a potential rival to Lesnar in years to come.

Mir-Lesnar II is now officially postponed from the original May 23 date.

Frank Mir appeared on the UFC 96 PPV broadcast with Mike Goldberg. He confirmed that he got his knee scoped recently and it would take 4-6 weeks for his knee to be 80 percent, and then he could do light sparring. Mir said he wants to possibly do the fight on July 11 so he can fight Brock Lesnar at 100 percent, and have no excuses.

They did not confirm July 11 as the definite date of the Lesnar vs. Mir rematch, but it sounds like that's the plan, assuming Mir's healing process doesn't hit any roadblocks.

Mir said it was a lingering knee injury and that the knee just finally popped in practice a while back, necessitating the surgery.

They showed Brock Lesnar in the audience but didn't give him a chance to comment.

The eighth season of The Ultimate Fighter pits UFC interim heavyweight champion Antonio Rodrigo Nogueira against his next challenger, Frank Mir, as coaches of a group of fighters vying for UFC contracts. This season, we've got a UFC contract up for grabs in two different weight classes: Lightweight and light heavyweight.

Like last season, the show will stick to the formula of having 32 men fight their way into the house over the course of the first two episodes. That pretty much guarantees rapid-fire action on the early episodes. Usually, you'd think cramming eight fights featuring largely unfamiliar names into about 44 minutes (a one-hour show minus the commercial time) would make it impossible for any personalities to shine through, or bizarre extra-curriculars to take place. Having seen the first episode, I assure you that's not the case here.

Without dishing out spoilers, I can tell you there is one strange incident within the first three minutes of the premiere (before Dana White even finishes his opening speech) that has never happened before on TUF. There is an issue with one fighter having real problems cutting weight, culminating with an ill-advised verbal tirade against a very important official.

There is more of the grandiose trash talk we've come to love in the prefight interview segments, with my favorite line of the entire show coming from Junie Browning, who found a clever way of illustrating his opponent's chance of winning against him (I'll let you tune in for the actual quote).

Despite the wall-to-wall fights, you really do get to know some of the fighters, with two names already famous by association. Jason Guida, the older (and much larger) brother of UFC fan favorite Clay Guida, is featured prominently on episode one. Lance Evans is also front and center on the first episode. Lance's brother Rashad -- maybe you've heard of him -- just knocked out Chuck Liddell, so yeah... he's kind of a big deal. But family names only get you so far, and Evans and Guida have to fight their way into the house like the rest of the crew.

Can they do it? No spoilers here.

But I will say this: While I thought it was a smart move for the UFC and Spike TV to switch to the "fight your way into the house" format, it posed a problem last season that, so far, seems to have been alleviated this time around. When you've got eight fights per show for the first two episodes, you're basically asking viewers to watch two hours of full-contact auditions before the real show starts. It's the third episode before we know who the final 16 guys are, and before we see any major interaction within the house -- which serves the purpose of letting viewers get familiar with the fighters, their personalities (or lack thereof), senses of humor (or lack thereof), and other intangibles.

Judging by the first episode of TUF 8, they've done a better job of infusing the "tryout" episodes (for lack of a more fitting term) with enough subtext and storytelling that it feels more like a true episode, and less like an extended sneak peek at the auditioning process. By the third episode, when we're down to 16 fighters, viewers will probably feel more familiar with the new cast than last season.

One final note: CBSSports.com will have an exclusive weekly blog from TUF 8 contestant Tom Lawlor, who will post after each new episode has aired with his thoughts, opinions, and stuff you didn't see on the broadcast. Check out Tom Lawlor's CBSSports.com blog right here.

Mir entered to Nas' "Hate Me Now." Lesnar came out to Motley Crue's "Shout at the Devil."

Round 1: Mir throws a kick and Lesnar immediately takes him to the mat. Lesnar with strikes as Mir tries to turn into him. Lesnar lands some strikes and referee Steve Mazagatti stops them, deducting a point from Lesnar for one of the punches hitting Mir in the back of the head. Upon restarting, Lesnar resumes ground and pound. Mir tries for an armbar twice but Brock is too strong. Lesnar is standing over Mir looking to punch, and Mir grabs the leg and taps Brock out with a kneebar.